The Forza 4 November Speed Pack will be available from 1st November for 560 Microsoft Points.
Inside are 10 cars: a Lambo, an Asto, two Audi-os, a Chevo, a Dodge-o, a Ferraro, a Fordo, an err GMC-o and a Volkso.
The November Speed Pack can be redeemed using the 2400 MSP Forza 4 Season Pass, if you have it. A more descriptive November Speed Pack list: